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Doctor insights on: Excess Vitamin B12 Side Effects

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Dr. Milton Mintz
Board Certified, Geriatrics
61 years in practice
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Dr. Eric Weisman
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Dr. Su Fairchild
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Vitamin B12 (Definition)

Vitamin B12 is a vitamin which is a kind of nutritional agent ...Read more


Dr. Alan Ali
Board Certified, Psychiatry
26 years in practice
176M people helped
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Do vitamin B12 supplements have any side effects?

Do vitamin B12 supplements have any side effects?

B12 Vitamin: Generally, there is no risk of toxicity from too much b12, however, if taken at same time with antibiotics for acne, such as tetracycline, it can lower effectiveness of the antibiotic. Some reported adverse events include allergy, fever, headaches, joint pains, upset stomach, swelling, dizziness. ...Read more

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Dr. Eric Weisman
Board Certified
30 years in practice
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Dr. Andrew Blazar
Board Certified, Obstetrics and Gynecology
56 years in practice
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Dr. Jack Mutnick
Board Certified, Allergy and Immunology
11 years in practice
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Should i consume tinospora cardifolia concentrate, as in 2010 i was diagnosed with itp and vitamin B12 deficiency? Does the herb has side effects?

Should i consume tinospora cardifolia concentrate, as in 2010 i was diagnosed with itp and vitamin B12 deficiency? Does the herb has side effects?

ITP: You really should discuss this with your hematologist who treated your itp and/or whomever follows you for this condition. I cannot personally recommend you to take an "herbal concentrate" since it is not monitored by the fda and side effects have been reported. ...Read more

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Dr. Eric Weisman
Board Certified
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Dr. Jack Rubin, M.d.
Board Certified, Nephrology and Dialysis
42 years in practice
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My doc says im aneamic and has prescribed me dexorange syrup it has iron folic acid and vitamin B12 but im afraid will it giv me any side effects?

My doc says im aneamic and has prescribed me dexorange syrup it has iron folic acid and vitamin B12 but im afraid will it giv me any side effects?

Anemia treatmemt: Other than possible constipation, caused by iron, the syrup (s) your physician (p) prescribed will give harmless. Ask your p what you folate, iron and B12 values are. If they are normal, you will gain nothing by the s. Anemia can come from blood loss, either by GI or menstrual losses. If you iron (i) level is low, and you eat meat, consider one of those as the cause of your anemia. ...Read more

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Dr. Daniel Goldman
Board Certified, Internal Medicine
21 years in practice
103K people helped
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Vitamin B12 pills benefits and side effaces??

Take only if needed: If you are vitamin B12 defecient, then a B12 supplement can help with anemia and nerve function. If you are not B12 defecient, the it will not help. Overdosing of Vitamin B12 can cause nerve dysfunction, diarrhea, and other side effects. My general advice is that if you do not have a vitamin defeciency, the a general multivitamin once daily is all that you need. ...Read more

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Dr. Su Fairchild
Board Certified, Integrative Medicine
18 years in practice
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Dr. Dariush Saghafi
Board Certified, Neurology
27 years in practice
11M people helped
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8
I have severe vitamin b12, d deficiency and at same time has excess production of sebum on scalp. Is both are related??And any other mineral for it??

I have severe vitamin b12, d deficiency and at same time has excess production of sebum on scalp. Is both are related??And any other mineral for it??

Unrelated: There is no direct relationship or association I am aware of between seborrhea (what you have) and B12 deficiecy. You are very young for being so B12 deficient. Do you not like LIVER, SALMON, TROUT, CLAMS, or BEEF? A mineral put into shampoos is selenium but I find that has variable effects. Check with a dermatologist for more information...and fix your B12 status...VERY IMPORTANT! ...Read more

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Dr. Yash Khanna
Board Certified, Family Medicine
51 years in practice
131M people helped
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9
I have red bumps on left side of tongue..not sore..i am also vitamin B12 defiency..what could it be..im getting injections every week.. then 3 months?

I have red bumps on left side of tongue..not sore..i am also vitamin B12 defiency..what could it be..im getting injections every week.. then 3 months?

Vitamin B12 Deficien: Bumps on tongue can be caused by VitB12 Deficiency.Other causes are Smoking,Canker Sores and viral infections Consult your doctor if it is painful and a concern for you ...Read more

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Dr. Bernard Seif
Board Certified, Clinical Psychology
34 years in practice
5M people helped
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I have vitamin B12 Deficiency.I'm getting injections. I pulled my wash line with wet clothes on it and now my right side hurts. With the odd sting.

I have vitamin B12 Deficiency.I'm getting injections. I pulled my wash line with wet clothes on it and now my right side hurts. With the odd sting.

Your pain is likely: related to the strain from pulling the wash line. Please have your doc check. Experts on vitamin D3 recommend between 50 & 80 lab values for optimal health. Your doc will be able to tell you your level. Peace and good health. ...Read more

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Dr. Eric Weisman
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